. >> catherine: tonight, we're learning more about how 13 year old andy lopez was killed by a sheriff's deputy in santa rosa. >> reporter:hundreds of people gathered again for another rally in his honor.. kron 4's charles clifford is in santa rosa and has the latest. >> reporter:on wednesday afternoon, hundreds of people rallied in santa rosa, demanding justice for the death of 13-year-old andy lopez. >> reporter:meanwhile new details have emerged into exactly what happened that fatefull day here along moorland avenue. >> reporter:the santa rosa police department and petaluma police are investigating the shooting and they confirmed on wednesday that two deputies confronted andy lopez, but that only one...deputy erik gelhous.. fired his weapon. the other deputy, a trainee, was driving the patrol car and by the time he exited the vehicle, lopez had already been shot. >> reporter:we have also learned that a witness may have been driving just ahead of the patrol car and spotted lopez moments before the deputies did. >> he rolled out to them out his window and yelled that the young man shoul